Manufacture of inverted mantles.



S E L T N A M D E N N H ON C IF S E R U T C A F U N A M Patented A11 24,1915.

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11 um P A D E L F N 0 T A C L P P A ,H:HHHHHHHZ WITNESSES S. COHN.

MANUFACTURE OF INVERTED MANTLES.

APPLlCATlON .EILED APR. 17, 19l2. 1,151,342. Patented Aug. 24,1915.

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WITNESSES SAMUEL COHN, OF NEW YORK, N.

Y., ASSIGNOR TO MANTLE MACHINERY & PATENTS COMPANY, OF NEW YORK, N. "SC,A CORPORATION OF NEW YORK.

IMANUFAGTURE OF INVERTED MANTLES.

Specification of Letters Patent.

Patented Aug. 24, 1915.

Application filed April 17, 1912. Serial No. 691,425.

To all whom it may concern Be it known that I, SAMUEL Conn, a res1- dentof New York city, in the county and State of New York, have invented anew and useful Improvement in the Manufacture of Inverted Mantles, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying drawings, froming part of thlsspecification, in which- Figures 1, 2, 3 and 4: are perspective viewsillustrating a series of steps taken upon a mantle blank. Fig. 5 showsthe first step in my process. Fig. 6 shows the shape of the mantle whilebeing sewed or darned. Figs. 7 and 8 are, respectively, a perspectiveview and an end elevation of the finished mantle. Fig. 9 is a sectionalside elevation of the machine on the line IX-IX of. Fig. 10, showing theoperating parts of the darning machine which I prefer to employ. Fig. 10is a top plan view of the operating plate and ratchet disk. Figs. 11 and12 are sectional detail views on the line XIXI of Fig. 10, showingdifferent positions of the plate reciprocating mecha nism. Fig. 13 is acentral vertical cross-section of theratchet disk. Fig. 14 is a top planview ofv the mantle showing the stitch design and arrangement.

My invention relates to the manufacture of inverted mantles and isdesigned to avoid the difiiculties incident to the thick mass oflongitudinally extending folds which are gathered toward the center atthe closed end.

In accordance with my invention, the end i of the mantle is gathered,but the folds are not pulled together and compacted in longitudinalform. On the contrary a hole is left of considerable size at the centerof the mantle, the gathered portions extending in wardly in a transversedirection toward this hole; and by means of impregnated thread, the holeis mechanically darned so as to close it with the same material as thatof the mantle. In carrying out the invention, a circular row of stitchesis preferably taken around the hole to fix the threads in position andthe darning is then proceeded with to fill up the hole.

In the drawings, Fig. 1 represents the ordinary blank 2 cut from thehollow or knitted and impregnated web with the shirring string 3therein. Fig. 2 shows the blank secured to the mantle ring 4 by the cord5. Fig. 3 shows the mantle blank then turned right side out; 6 being thelegs of the mantle ring. The portion carrying the draw string 3 is thenpushed down through the hole in the ring 4 into the position shown inFig. 4., The lower shirred and partly compacted end is then pulledtogether and tied around the tapered part of a pin 7, shown in Fig. 5.After tying the draw string or cord, the tied end is then forced down onto the cylindrical part 8 of the pin, tllls fixing the size of the holeat the shirred en The blank is now ready for the machine operation, andI will now describe a preferred form of machine shown in Figs. 9 to 13,inclusive, for darning and stitching the blank. The machine may take theform of an attachment to an ordinary sewing ma chine, 9 representing thebed plate of the sewing machine, having side guides 10, 10 to receive areciprocating plate 11, which has a circular opening receiving theringshaped portion 12 of al'ratchet disk 13 provided with ratchet teeth14 on its bottom surface. This ratchet disk also has a central hole,shown at 15, and is arranged to turn within the hole in thereciprocating plate 11.

The reciprocating plate, in the form shown, is provided with a rearguide 16, receiving a vertically movable'transverse catch plate 17, theprojecting endsof which enter the wider recesses 18 in the side guides.When the catch plate is in lowered position, it allows the reciprocatingplate to move *back and forth with a limited movement.

When it is raised, the plate, disk and guide may be drawn out endwisefrom the guides. The ratchet disk turns on the bed plate above theneedle hole 19 therethrough, which needle hole is normally at one sideof the opening through the disk. The mantle blank prepared as abovedescribed is forced within the circular flange of the ratchet disk withthe hole in the mantle concentric with the hole in the disk. The legs ofthe refractory ring for the man tle are guided and supported by a ring20 secured to the depending rame portion 21 of the machine; and insteadof using a presser'foot with the needle 22, I preferably employ a spiralspring 23 surrounding the needle.

I provide mechanism for intermittently 31. *A pawl 32 pivoted to rockarm 33 secured to shaft is held in engagement with the ratchet wheel 80by a spring 34 securedto bracket 27 The cam disk 31 acts upon adependlng pin on a downwardly extending leaf spring 86 secured o feedplate 37 mounted on the feed arm. This spring 36 has'a pawl tooth 38'moving up through hole in the feed plate, and also in the bed plate-soas to cotiperate with a tooth 39. projecting downwardly from thereciprocating plate 11. A two-armed coiled spring is fas tened to one ofthe bed plate guides,-'as shown at 40 in Fig. 10, one arm of this springengaging a pin Al on the guide, while the other arm'AE J engages theedge of the reciprocating plate and tends to force it constantly towardthe right.

The operation of these parts is as follows: At each advance of the feedarm 24k the ratchet wheel 30 and the cam disk 31 move therewith and thepawl 32 moves to the right until it reaches and engages a succeedingtooth of the ratchet wheel. Upon the return of the feed arm and pawl 22,the latter will cause the ratchet wheel and cam disk to rotate one unitof'movement. This rotation occurs at each stitch period of the machine.Vfhile the cam disk progresses,

the pin 35 on spring '36 will ride on a raised portion of the cam diskduring a complete stitch period, and then will ride on a depressedportion through a like period. When the pin rides on the raised part ofthe cam disk, the pawl 38 will be in the path ofpawl 39. Under theseconditions, as the" feed arm moves to the left, the reciprocating. platewill be moved inthe same direction. At about this time, theineedle willdescend and form a stitch as shown at 43 in Fig. 14.-. As the needleascends the feed A and by the timethe needle is lifted the feed arm hasreached its extreme position to the right. Before the needle has fullyascended, and at the time when the feed arm has been loweredby theeccentric for such disengagement, the reciprocating plate 11 will havebeen returned bythe spring arm 42. By this time-the feed arm will havereached its extreme right hand position, the pawl 22 will have engaged asuccessive tooth in the ratchet wheel and carried it one unit of I haveshown the of thecam disk will cause the. pawl to clear the tooth 39, andhence the reciprocating. plate will not be moved during the next step.The needle will descend and form a cross stitch as at 4:4 by thetime thefeed arm has reached its extreme left-hand position. As the needleascends the feed arm will begin its movement to the right, bringing intooperation the pawl 32, which will again move'one of theraised portionsof the cam disk underneaththe depending pin 85.,

At this point the pawl 38 will-have'engaged tooth 39, and as the needleis now descending, the reciprocating plate will again be moved in theleft-hand direction, and at this time the point 45 of the mantle willabebrought underneath the needle owing to the rotation of the mantleholdingdevice. A continuation ofthese operations will form stitches in thedesign shown in Fig. 1411 The holein the mantle is thus darned andfilled with cross stitchesor threads. After the darning process,themachine may bestopped and 'thebl'ank removed and the after treatmentsthereon are the same as these-gen erally used. i

The advant ages of my invention result from the darning ofthe hole leftinthe end of the mantle, and "the doing-away with the longitudinal foldsdrawn together at the center of: inverted mantles. By the machinedarning, a larger hole may be left than in hand darning, and the useofthe spring for 1 the needle keeps pressing'down the plaits or folds ofthe mantle, so as te make the fabric'even and symmetrically disposed. It

is evident, that the larger the hole',fthe fi ner and thinner will bethe pl'aitsaround' it at the dome end. Lighter thread may beused than inhand darning'as the fabric is held together the shining thread beforethe darning operation ca'iii ed out; The use of, this invention hasshown that the material at the dome end of the mantle will be veryevenly distributed and it will be almost as thin and even as the rest ofthe fabric;

Instead of closing the hole by darning it with a series of stitches, Imay cover the hole with a patch, which is a patch of impregnatedmaterial which will be stitched in place by a circularrow of stitches.

Many other variations maybe made'in' the" form of the machine and thesteps of the process, without departing from'my invention.

T claim 2+ 7 I 1. In the manufacture of inverted mantles, the stepswhich consist in permanently securing one end of a tubular mantle blankto a supporting ring, turning the blank inside out through the ring,contracting the other end of said blank by forming shirrs therein, andsecuring said shirrs, compacting the terminals of the shirrs byenlarging the opening through the reduced end of the blank to apredetermined size, and closing the said opening of predetermined sizeby a fabric material extending across the same.

2. In the manufacture of inverted mantles, the steps consisting insecuring one end of a tubular mantle blank to a ring, turnlng the mantleinside out, contracting the opposite end by shirring, While leaving 15 ahole through said end, increasing the size of the hole, and at the sametime compacting the shirrs and cross-darning the hole.

In testimony whereof, I have hereunto set Copies of this patent may beobtained for five cents each, by addressing the Commissioner of PatentsWashington, D. G.

